<template>
    <div class="login">
        <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
            <h3 class="title">若依后台管理系统</h3>
            <el-form-item prop="username">
                <el-input
                    v-model="loginForm.username"
                    type="text"
                    size="large"
                    auto-complete="off"
                    placeholder="账号"
                >
                    <template #prefix
                        ><svg-icon icon-class="user" class="el-input__icon input-icon"
                    /></template>
                </el-input>
            </el-form-item>
            <el-form-item prop="password">
                <el-input
                    v-model="loginForm.password"
                    type="password"
                    size="large"
                    auto-complete="off"
                    placeholder="密码"
                    @keyup.enter="handleLogin"
                >
                    <template #prefix
                        ><svg-icon icon-class="password" class="el-input__icon input-icon"
                    /></template>
                </el-input>
            </el-form-item>
            <el-form-item prop="code" v-if="captchaEnabled">
                <el-input
                    v-model="loginForm.code"
                    size="large"
                    auto-complete="off"
                    placeholder="验证码"
                    style="width: 63%"
                    @keyup.enter="handleLogin"
                >
                    <template #prefix
                        ><svg-icon icon-class="validCode" class="el-input__icon input-icon"
                    /></template>
                </el-input>
                <div class="login-code">
                    <img :src="codeUrl" @click="getCode" class="login-code-img" />
                </div>
            </el-form-item>
            <el-checkbox v-model="loginForm.rememberMe" style="margin: 0px 0px 25px 0px"
                >记住密码</el-checkbox
            >
            <el-form-item style="width: 100%">
                <el-button
                    :loading="loading"
                    size="large"
                    type="primary"
                    style="width: 100%"
                    @click.prevent="handleLogin"
                >
                    <span v-if="!loading">登 录</span>
                    <span v-else>登 录 中...</span>
                </el-button>
                <div style="float: right" v-if="register">
                    <router-link class="link-type" :to="'/register'">立即注册</router-link>
                </div>
            </el-form-item>
        </el-form>
        <!--  底部  -->
        <div class="el-login-footer">
            <span>Copyright © 2018-2023 ruoyi.vip All Rights Reserved.</span>
        </div>
    </div>
</template>

<script setup lang="ts">
import { getCodeImg } from '@/api/login';
import Cookies from 'js-cookie';
import { encrypt, decrypt } from '@/utils/jsencrypt';
import useUserStore from '@/store/modules/user';
import { useRouter } from 'vue-router';
import { FormInstance } from 'element-plus';
import { ref } from 'vue';

const userStore = useUserStore();
const router = useRouter();
const loginForm = ref<any>({
    username: 'admin',
    password: 'admin123',
    rememberMe: false,
    code: '',
    uuid: '',
});

const loginRules = {
    username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
    password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
    code: [{ required: true, trigger: 'change', message: '请输入验证码' }],
};

const codeUrl = ref('');
const loading = ref(false);
// 验证码开关
const captchaEnabled = ref(true);
// 注册开关
const register = ref(false);
const redirect = ref(undefined);
const loginRef = ref<FormInstance>();

function handleLogin() {
    loginRef.value?.validate(valid => {
        if (valid) {
            loading.value = true;
            // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
            if (loginForm.value.rememberMe) {
                Cookies.set('username', loginForm.value.username, { expires: 30 });
                const enPwd = encrypt(loginForm.value.password);
                if (enPwd) {
                    Cookies.set('password', enPwd, { expires: 30 });
                }
                if (loginForm.value.rememberMe) {
                    Cookies.set('rememberMe', String(loginForm.value.rememberMe), { expires: 30 });
                }
            } else {
                // 否则移除
                Cookies.remove('username');
                Cookies.remove('password');
                Cookies.remove('rememberMe');
            }
            // 调用action的登录方法
            userStore
                .login(loginForm.value)
                .then(() => {
                    router.push({ path: redirect.value || '/' });
                })
                .catch(() => {
                    loading.value = false;
                    // 重新获取验证码
                    if (captchaEnabled.value) {
                        getCode();
                    }
                });
        }
    });
}

function getCode() {
    getCodeImg().then((res: any) => {
        captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
        if (captchaEnabled.value) {
            codeUrl.value = 'data:image/gif;base64,' + res.img;
            loginForm.value.uuid = res.uuid;
        }
    });
}

function getCookie() {
    const username = Cookies.get('username');
    const password = Cookies.get('password');
    const rememberMe = Cookies.get('rememberMe');
    loginForm.value = {
        username: username === undefined ? loginForm.value.username : username,
        password: password === undefined ? loginForm.value.password : decrypt(password) || '',
        rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
    };
}

getCode();
getCookie();
</script>

<style lang="scss" scoped>
.login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-image: url('../assets/images/login-background.jpg');
    background-size: cover;
}
.title {
    margin: 0px auto 30px auto;
    text-align: center;
    color: #707070;
}

.login-form {
    border-radius: 6px;
    background: #ffffff;
    width: 400px;
    padding: 25px 25px 5px 25px;
    .el-input {
        height: 40px;
        input {
            height: 40px;
        }
    }
    .input-icon {
        height: 39px;
        width: 14px;
        margin-left: 0px;
    }
}
.login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
}
.login-code {
    width: 33%;
    height: 40px;
    float: right;
    img {
        cursor: pointer;
        vertical-align: middle;
    }
}
.el-login-footer {
    height: 40px;
    line-height: 40px;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: Arial;
    font-size: 12px;
    letter-spacing: 1px;
}
.login-code-img {
    height: 40px;
    padding-left: 12px;
}
</style>
